Citrix NetScaler ADC/NetScaler Gateway NSIP/CLIP/SNIP code injection

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
6.8	$0-$5k	0.00

Summaryinfo

A vulnerability was found in Citrix NetScaler ADC and NetScaler Gateway. It has been rated as critical. This impacts an unknown function of the component NSIP/CLIP/SNIP. This manipulation causes code injection. This vulnerability is handled as CVE-2023-6548. The attack can be initiated remotely. Additionally, an exploit exists. Upgrading the affected component is advised.

Detailsinfo

A vulnerability classified as critical was found in Citrix NetScaler ADC and NetScaler Gateway (Network Management Software) (version unknown). Affected by this vulnerability is an unknown function of the component NSIP/CLIP/SNIP. The manipulation with an unknown input leads to a code injection vulnerability. The CWE definition for the vulnerability is CWE-94. The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment. As an impact it is known to affect confidentiality, integrity, and availability.

The weakness was released 01/16/2024 as CTX584986. It is possible to read the advisory at support.citrix.com. This vulnerability is known as CVE-2023-6548 since 12/06/2023. Technical details are unknown but an exploit is available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 01/28/2025). The attack technique deployed by this issue is T1059 according to MITRE ATT&CK.

It is declared as attacked. The CISA Known Exploited Vulnerabilities Catalog lists this issue since 01/17/2024 with a due date of 01/24/2024:

Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Upgrading eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Zero-Day.cz (849). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

Network Management Software

Vendor

Citrix

Name

License

commercial

Website

Vendor: https://www.citrix.com/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.9
VulDB Meta Temp Score: 6.8

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 8.8
NVD Vector: 🔍

CNA Base Score: 5.5
CNA Vector (Citrix Systems, Inc.): 🔍

CVSSv2info

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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Code injection
CWE: CWE-94 / CWE-74 / CWE-707
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Attacked

EPSS Score: 🔍
EPSS Percentile: 🔍

KEV Added: 🔍
KEV Due: 🔍
KEV Remediation: 🔍
KEV Ransomware: 🔍
KEV Notice: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Zero-Day.cz: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Timelineinfo

12/06/2023 🔍
01/16/2024 +41 days 🔍
01/16/2024 +0 days 🔍
01/28/2025 +377 days 🔍

Sourcesinfo

Vendor: citrix.com

Advisory: CTX584986
Status: Confirmed

CVE: CVE-2023-6548 (🔍)
GCVE (CVE): GCVE-0-2023-6548
GCVE (VulDB): GCVE-100-250831
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 01/16/2024 16:16
Updated: 01/28/2025 00:30
Changes: 01/16/2024 16:16 (39), 01/17/2024 07:44 (3), 02/06/2024 08:40 (1), 02/06/2024 08:43 (21), 04/30/2024 11:36 (23), 06/05/2024 09:32 (2), 09/09/2024 22:30 (2), 01/28/2025 00:30 (1)
Complete: 🔍
Cache ID: 216::103